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  1. using namespace std;
  2. #include <iostream>
  3. #include <vector>
  4.  
  5.  
  6. // combine two sorted lists A and B into R
  7. // displays comparison every time it is done
  8. void combine(const vector<int>& A, const vector<int>& B, vector<int>& R)
  9. {
  10.     auto itA = A.begin();
  11.     auto itB = B.begin();
  12.  
  13.     while ( (itA != A.end()) && (itB != B.end()) )
  14. 	{
  15.         if (*itA < *itB) 
  16. 		{
  17.             R.push_back(*itA);
  18. 			itA++;
  19.         }
  20.         else 
  21. 		{
  22.             R.push_back(*itB);
  23. 			itB++;
  24.         }
  25.     }
  26. 	while(itA != A.end())
  27. 	{
  28. 		R.push_back(*itA);
  29. 		itA++;
  30. 	}
  31. 	while(itB != B.end())
  32. 	{
  33. 		R.push_back(*itB);
  34. 		itB++;
  35. 	}
  36. 	cout << "comparison" << endl;
  37. 	// be careful -- R comes in as an empty vector
  38. }
  39.  
  40.  
  41. int main()
  42. {
  43.     vector<int> L1;
  44.     vector<int> L2;
  45.     vector<int> L3;
  46.     int N;  // how many elements in each of L1 and L2
  47.     int e;  // for each element
  48.  
  49.     cout << "How many elements in each list?" << endl;
  50.     cin >> N;
  51.  
  52.     cout << "List1" << endl;
  53.     for (int i = 0; i < N; i++)
  54.     {
  55.     	cout << "element :"<<endl; cin >> e; L1.push_back(e);
  56.     }
  57.  
  58.     cout << endl << "List2" << endl;
  59.     for (int i = 0; i < N; i++)
  60.     {
  61.     	cout << "element :"<<endl; cin >> e; L2.push_back(e);
  62.     }
  63.  
  64.     combine(L1, L2, L3);
  65.  
  66.  
  67.     cout << "The result is: ";
  68.     for (int i = 0; i < N * 2; i++)
  69.     {
  70.         cout << L3[i]<<" | ";
  71.     } cout << endl;
  72.  
  73. }// end of main
Success #stdin #stdout 0s 4404KB
comments (?)
stdin 
3
1 3 5 2 4 6
stdout 
How many elements in each list?
List1
element :
element :
element :

List2
element :
element :
element :
comparison
The result is: 1 | 2 | 3 | 4 | 5 | 6 |
https://ideone.com/0Zj2To
https://stackoverflow.com/questions/58140452/adding-elements-to-a-vector
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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